This School is no longer MSHSAA Member School. School Colors & Logos Mustangs Navy Blue/Kelly Green boys girls Social Media MarquetteStangs Membership Full Member High School, Grades 9-12 St. Louis County Board District: #7 St. Louis Contact Information 2351 Clarkson Rd Chesterfield, MO 63017-7122 (636) 891-6000 (636) 537-4319 fax Location 2351 Clarkson Rd Chesterfield, MO 63017-7122 (636) 891-6000 Get Directions